正确答案: D

提供优质水源

题目：22上海在长兴岛北侧边滩筑堤建成青草沙水库。该水库主要功能是

解析：D

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学习资料的答案和解析：

[单选题]DNext time a customer comes to your office, offer him a cup of coffee. And when you’re doing your holiday shopping online, make sure you’re holding a large glass of iced tea. The physical sensation(感觉) of warmth encourages emotional warmth, while a cold drink in hand prevents you from making unwise decisions—those are the practical lesson being drawn from recent research by psychologist John

his physical feeling of coldness

[单选题]蝶形花冠中位于最内方的是( )。

龙骨瓣